Chain-repairing implement.



J. N. MACDONALD. CHAIN REPAIRING IMPLEMENT.

APPLICATION FILED JULY 14, 1909.

[965,722, Patented July 26, 1910.

VII/ll I 7 3 7 Wm I Jill/V Macdvim/d.

atkozwmg dorm N. MAcDoNALD, or nanrroian, CONNECTICUT CHAIN-REPAIRING- IMPLEMENT.

Specification of Letters Patent.

Patented army as ioio.

Application filed July 14,1909. Serial No. 507,659. yy

To all, whom it may concern:

Be it known that 1, JOHN N, MACDONALD, a citizen of the United States, residing at Hartford, in the county .of Hartford and State of Connecticut, haveinventednew and useful Improvements in Chain-Repairing Implements, .of which the following is a specification.

This invention relates to an improved implement for repairing chains, such as the tire chains of automobiles and thelike, and

it has for its object to provide a simple and improved device of this character, which may be conveniently carried in a tool chest or in an ordinary repair kit and bythe use of which links may be expanded and again closed as maybe required. I

Another object of the invention is to provide a simple and improved implement in the shape of a pair of tongs or pliers and having jaws that are shaped to form coacting wedges which may be inserted in the joint of a chain. link, for the purpose of expanding the latter when the jaws are closed together.

A still further object of the inve'ntionis .to construct the jaws of the tongs or pliers with shoulders or ofi-sets upon which a chain link may be supported while being compressed to close the joint.

A still further object of the invention is to 'so construct the shoulders or ofi-sets that they may be utilized for the purpose .of com-' parts which will be hereinafter fully de scribed and particularly, pointed out in the claim.

In the accompanyin drawing has been illustrated a simple an preferred form of j the invention; it being however understood that nolimitation is necessarily made to the precise structural details therein exhibited but that changes, alterations and modifications within the scope of theinvention may be resorted to when desired. y

In the drawing: Figureol is a front view of an implement constructed in accordance with the invention. Fig. 2 is a side View of the same.

'set 9 of the Fig. 3 is a transverse sectional view taken on the plane indicated by the handle portion 6 and a jaw portion 7. The jaws 7 are formed of considerable width as compared with the handles, and said jaws are shaped to form curved or arcuate hooks,

jaws of the two members, A and B each comprising a the bills of which, 8, extend toward each other; the bill of one hook being overlapped bythe bill of its mate. The members A and B are provided adjacent to the hook shaped jaws and intermediate. said jaws and the handle portions, with laterallyextending offsets or shoulders 9, for the passage of the connecting pin or pivot 10 which is eccen- .tr-ically disposed, near the outer edge of one of the shoulders 9 and at a point remote from the outer-edge of theshoulder or offroximate member so that the outer face of one of the jaw-bills, andthe inner face of the bill of the other jaw will be concentric with the axis of'the pivot 10;

said faces being also devised to lie in con- 5 tact with each other when the jaws are closed together. The bills 8' *of the hook shaped jaws 7 are wedge-shaped as shown and owing to the eccentric disposition of the pivot connecting the members A and B the said wedge shaped-bills will move incontact with each other, while the jaws are being moved to an openiposition, causing the sharp edges of the wedges to be adj acently -placed when the jaws are opened, aswill appear by reference to Fig. 5 of the drawings.

Thejaws are formed with lateral projections or'off-sets 11 on their opposite faces,

said off-sets combining with the bill portions of the aws to form a recess of the shape and dimensions of an oblong chain link, of one of the kind that the tool is designed to operate upon; the outer portions of the jaws are relatively of great width and by properly shaping the jaws they will when closed together exert an expanding wedge action upon material, such as achain link engaged thereby.

When a machine is to be disjointed for the purpose of inserting a new link orfor any other reason, one of the links may be opened by swinging the jaws ofthe tool to an open position, after which the terminal edges of the jaws are placed .in engagement with the joint of the link upon opposite sides of the latter; by closing the jaws together the wedge shaped bills of the jaws will spread the link open as will be readily understood. When the link is to be closed, said link, if of the conventional oblong shape, may be placed between the jaws while the latter are open in such a manner as to be supported upon the otf-sets'll and between the latter and the bills of the hooks constituting the jaws; by closing the latter the link will be compressed as will be readily understood. Other forms of links may be closed by pressure between the portions of the jaws adjacent to the inner faces of the shoulders or off-sets 11, which latter will constitute stops to prevent slipping.

Having thus described the invention what is claimed is A tool of the character described comprising two members having terminal jaws provided with relatively wide unobstructed wedge-shaped bills overlapping one another and said members being connected by an cecentrically disposed pivot; the outer face of one jaw bill and the inner face of the bill of the other jaw being adapted to move by and lie in contact with each other throughout the width of the wedges formed by said jaws when the pivoted members are closed together thereby forming a double extending wedge; the jaws being provided upon their inner faces intermediate the bills and the pivotal connecting point with inwardly extending offsets combining with the bills to form an oblong recess.

In testimony whereof, I afiix my signature in presence of two witnesses.

JOHN N. MACDONALD.

VVitn'esses ARTHUR T. SMITH, WM. BARLO\V. 

